The density of the sample is:
Density = mass / volume
Density = 9.85 / 0.675
Density = 14.6 g/cm³
If the sample has 95% gold, and 5% silver, its density should be:
0.95 x 19.3 + 0.05 x 10.5
Theoretical density = 18.9 g/cm³
The difference in theoretical and actual densities is very large, making it likely that the jeweler was not telling the truth.
The change in the atmosphere
Hi,
You didn't mention what "the following" were - please add additional information so the problem can be solved.
Answer:
Painting with an oil based paint
Galvinization
Alloying
Explanation:
